Enable PythonScriptPlugin and NeuralMorphModel plugins.
Start game in standalone mode (e.g. starting the editor from the command line with `-game`).
The following error appears in the log:
LogPython: Error: Traceback (most recent call last): LogPython: Error: File "Engine/Plugins/Animation/MLDeformer/NeuralMorphModel/Content/Python/init_unreal.py", line 10, in <module> LogPython: Error: import mldeformer.training_helpers LogPython: Error: File "Engine/Plugins/Animation/MLDeformer/MLDeformerFramework/Content/Python\mldeformer\training_helpers.py", line 72, in <module> LogPython: Error: def update_training_device_list(training_model: ue.MLDeformerTrainingModel): LogPython: Error: ^^^^^^^^^^^^^^^^^^^^^^^^^^ LogPython: Error: AttributeError: module 'unreal' has no attribute 'MLDeformerTrainingModel'
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-269117 in the post.